Saw Blade With Round Cutting Edges

• US 20090126205A1
• Filed: 11/13/2008
• Published: 05/21/2009
• Est. Priority Date: 11/15/2007
• Status: Abandoned Application

• Current Assignee: Wikus-Saegenfabrik Wilhelm H. Kullmann GmbH & Co. Kg
• Original Assignee: Wikus-Saegenfabrik Wilhelm H. Kullmann GmbH & Co. Kg
• Inventors: Kwanka, Werner, Kullmann, Jorg H.
• Application Number:
  US12/269,957
• Publication Number:
  US 20090126205A1
• Time in Patent Office: Days
• US Class Current: 30/347
• CPC Class Codes: B23D 61/121 Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet

Abstract

A saw blade (1) includes a base body (2) and a plurality of teeth (3). The base body (2) defines a longitudinal center plane (14). The teeth (3) are designed and arranged to be unset and to be symmetric with respect to the longitudinal center plane (14). The teeth (3) are designed and arranged to form at least one group of teeth (3) on the base body (2). The at least one group of teeth (3) is repeated on the base body (2). The group of teeth (3) includes at least a first tooth (3₁) and a second tooth (3₂). The first tooth (3₁) includes a first cutting edge (10₁) being designed and arranged such that at least a portion of the first cutting edge (10₁) is designed to be rounded and to have at least one first radius (18₁). The second tooth (3₂) includes a second cutting edge (10₂) being designed and arranged such that at least a portion of the second cutting edge (10₂) is designed to be rounded and to have at least one second radius (18₂). The second radius (18₂) is different than the first radius (18₁).

Claims

1. A saw blade, comprising:

a base body, said base body defining a longitudinal center plane; and

a plurality of teeth,

said teeth being designed and arranged to be unset and to be symmetric with respect to the longitudinal center plane,

said teeth being designed and arranged to form at least one group of teeth on said base body, said at least one group of teeth being repeated on said base body, said group of teeth including at least a first tooth and a second tooth,

said first tooth including a first cutting edge, said first cutting edge being designed and arranged such that at least a portion of said first cutting edge is designed to be rounded and to have at least one first radius,

said second tooth including a second cutting edge, said second cutting edge being designed and arranged such that at least a portion of said second cutting edge is designed to be rounded and to have at least one second radius, said second radius being different than said first radius.

2. The saw blade of claim 1, wherein at least one of said rounded portions of said cutting edges is rounded in a way that it has at least two radiuses.

3. The saw blade of claim 2, wherein said two radiuses are directly connected without an intermediate arrangement of a corner.

4. The saw blade of claim 3, wherein said two radiuses are connected in a tangential direction.

5. The saw blade of claim 1, wherein said teeth include flanks, said at least partly rounded cutting edge being designed and arranged to be connected to said flanks in a tangential direction.

6. The saw blade of claim 1, wherein said teeth include a tooth back, at least one tooth in the region of said tooth back including a clearance surface, said clearance surface being designed and arranged to be rounded in one direction and to be convex in another direction.

7. The saw blade of claim 1, wherein said teeth further include a face, a clearance surface and a cutting edge radius, said cutting edge between said face and said clearance surface being designed to be rounded and to have a cutting edge radius of between approximately 15 μ

m and 45 μ

m.

8. The saw blade of claim 1, wherein said teeth further include a face, a clearance surface and a cutting edge radius, said cutting edge between said face and said clearance surface being designed to be rounded and to have a cutting edge radius of between approximately 15 μ

m and 30 μ

m.

9. The saw blade of claim 1, wherein said teeth are designed as form bodies made of hard metal, said form bodies being permanently connected to said base body.

10. The saw blade of claim 1, wherein said teeth are formed by form bodies, said form bodies including a carrier being made of hard metal and a layer having a hardness of at least 5,000 HK, said carrier being permanently connected to said base body.

11. The saw blade of claim 10, wherein said layer is made at least of one of the materials selected from the group consisting of PCD and CBN.

12. The saw blade of claim 1, wherein said teeth have a rake angle of between approximately −

10° and

20°

, a clearance angle of approximately between 0° and

15° and

a negative protecting bevel having a bevel angle of approximately between 0° and

−

25°

.